The word Sigma is a statistical term that measures how far a given process deviates from perfection.
The central idea behind 6 Sigma: If you can measure how many “defects” you have in a process, you can systematically figure out how to eliminate them and get as close to “zero defects” as possible and specifically it means a failure rate of 3.4 parts per million or 99.9997% perfect.
Key Concepts of 6 Sigma
At its core, 6 Sigma revolves around a few key concepts.
- Critical to Quality : Attributes most important to the customer.
- Defect : Failing to deliver what the customer wants.
- Process Capability : What your process can deliver.